XtermKeyModifierResource

Xterm XTMODKEYS resource ids used by CSI > Pp ; Pv m.

Values mirror xterm's control-sequences table for "Set/reset key modifier options (XTMODKEYS)": https://invisible-island.net/xterm/ctlseqs/ctlseqs.html. In that table, Pp = 4 selects modifyOtherKeys.